Kuntze, C.E.O. (5 November 1891), Revisio Generum Plantarum 1: 41 [comb. nov.]

basionym: Ionidium vernonii F.Muell. legitimate

• Comment: Given under CALCEOLARIA Loefl. (1758) (nom. rej.) non L. (1771) (nom. cons.)

Domin, K. (1928), Beitrage zur Flora und Pflanzengeographie Australiens. Bibliotheca Botanica 22(89): 984 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus enneaspermus var. vernonii (F.Muell.) Domin legitimate

Bennett, E.M. (14 November 1972), A revision of the Australian species of Hybanthus Jacquin (Violaceae). Nuytsia 1(3): 238 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus vernonii (F.Muell.) F.Muell. legitimate

Adams, L.G. & George, A.S. in George, A.S. (ed.) (1982), Violaceae. Flora of Australia 8: 105 [nomenclatural synonym]

nomenclatural synonym of: Hybanthus vernonii (F.Muell.) F.Muell. legitimate

Forster, P.I. (24 March 2021), Reinstatement of Pigea Ging., an earlier generic name for the spade flowers previously included in Afrohybanthus Flicker (Violaceae). Austrobaileya 11: 32 [nomenclatural synonym]

nomenclatural synonym of: Pigea vernonii (F.Muell.) P.I.Forst. legitimate

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